US4717014A - Screw conveyor - Google Patents

Screw conveyor Download PDF

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Publication number
US4717014A
US4717014A US06/931,441 US93144186A US4717014A US 4717014 A US4717014 A US 4717014A US 93144186 A US93144186 A US 93144186A US 4717014 A US4717014 A US 4717014A
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US
United States
Prior art keywords
feeder device
screw
conveyor
blades
screw conveyor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/931,441
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English (en)
Inventor
Ake Ekelund
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SIWERTEEL AB
Siwertell AB
Original Assignee
Siwertell AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siwertell AB filed Critical Siwertell AB
Assigned to AB SIWERTEEL reassignment AB SIWERTEEL ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: EKELUND, AKE
Application granted granted Critical
Publication of US4717014A publication Critical patent/US4717014A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G33/00—Screw or rotary spiral conveyors
    • B65G33/08—Screw or rotary spiral conveyors for fluent solid materials
    • B65G33/14—Screw or rotary spiral conveyors for fluent solid materials comprising a screw or screws enclosed in a tubular housing
    • B65G33/20—Screw or rotary spiral conveyors for fluent solid materials comprising a screw or screws enclosed in a tubular housing the housing being rotatable relative to the screw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G67/00—Loading or unloading vehicles
    • B65G67/60—Loading or unloading ships
    • B65G67/606—Loading or unloading ships using devices specially adapted for bulk material

Definitions

  • the present invention relates to a screw conveyor for bulk material.
  • Such screw conveyors have a housing and a conveyor screw mounted therein, said housing and said conveyor screw being relatively rotatable.
  • the housing is stationary and the conveyor screw is rotatable within the housing.
  • various types of feeder devices have been proposed. Examples of such feeder devices are those disclosed in U.S. Pat. No. 3,596,751 and European patent specification EP-A-57,167. These devices are of the type in which the screw and the feeder device are rotated in opposite directions.
  • the object of the feeder device is to positively supply the material into the screw, such that the screw can efficiently grab and convey the material through the screw conveyor.
  • the arrangement according to European patent specification EP-A-57,167 comprises a feeder wing in the form of a planar helix, as a result of which the feeder device can operate efficiently only when it is directed exactly vertically so that the planar helix sweeps across the bottom of the hold.
  • the commercially available practical embodiments of the feeder device according to the U.S. Pat. No. 3,596,751 are better in this respect since they function fairly well also when the vertical conveyor is inclined.
  • this type of feeder device has tended to leave material behind and to thump mechanically against the bottom of the hold.
  • the present invention aims at providing a screw conveyor which is superior to prior art constructions in that it operates satisfactorily and is subjected to a lesser degree to mechanical strain when the screw conveyor is inclined.
  • the screw conveyor according to the invention is designed in the manner defined by the appended claims.
  • FIGS. 1-7 are different views of the feeder device proper of the screw conveyor, FIGS. 1, 2, 3, 5, and 4 in that order being respective views at successive rotation angles of the feeder device, as indicated by arrows I to V in FIG. 6, FIGS. 6 and 7 being views from different tilted angles.
  • FIG. 8 illustrates an example of a metal plate or sheet in planar form which may be used for making a blade in a screw conveyor feeder device according to the invention.
  • FIG. 9 illustrates an example of a complete screw conveyor equipped with a feeder device according to the invention.
  • FIG. 9 illustrates a ship unloading device 1, a screw conveyor 2 and feeder device 3 according to the present invention.
  • the ship unloading device is constructed according to the U.S. Pat. No. 4,020,953.
  • the ship unloader has a feeder of the type which constitutes the subject matter of U.S. Pat. No. 3,596,751 but which is to be replaced by a feeder device 3 according to FIGS. 1-7 in order to become a screw conveyor according to the present invention.
  • the feeder device 3 according to FIGS. 1-7 has a tubular portion 10 surrounding the outer side of the screw conveyor housing 4, and the conveyor screw (not shown) extends downwardly through the feeder device 3 and has its shaft mounted in a bearing 11 (FIG. 6).
  • the bearing 11 After the feeder device 3 is rotated oppositely from the conveyor screw, the mounting of the feeder device 3 on the screw conveyor 2, the bearing 11 is covered with a lid 30.
  • the bearing 11 has three spokes 12 serving as attachments for three curved feeder blades extending up towards the cylindrical portion 10.
  • the cylindrical portion is connected with three inclined metal sheets or plates 13 cut out from the cylindrical portion 10 and constituting extensions thereof.
  • a blade portion 14 is welded to the front side (to the right in FIG. 1) of the blades 13. This blade portion is an initially approximately triangular plate bent in an edge press by successive bending operations to obtain a curved shape. Outside the bent plates 14 a further bent metal plate 15 is provided.
  • the plates 14 and 15 may be replaced by a single metal plate, the appearance of which in planar configuration will appear from FIG. 8.
  • this plate may be bent in an edge press by successive bending operations indicated by dash-dot lines in FIG. 8.
  • the plates 14, 15 are bent in such a manner that the plate 15 will connect onto the plate 14 and, besides, will obtain the shape shown in the drawings.
  • the shape is such that the outer edge 16 of the plate 15, which engages with and digs into the material, will successively move the material upwardly and inwardly towards the screw, as may be seen from a comparison of FIGS. 4, 5, 3, 2 and 1 in the order mentioned. Because of their arcuate shape, the plates 14 and 15 will strive to draw in the material from below, from above and from the side. In other words, the plates 14, 15 perform the function of a trawl which positively guides the material towards the conveyor screw.
  • this feeder device can operate very efficiently also when the screw conveyor is inclined. Inclination degrees of up to 35°-40° are entirely possible. This is due to the fact that the lower end of the feeder device in the plane of rotation is approximately spherical, although the individual blades 14, 15 are bent such that they will raise the material successively from the base and positively guide it into the screw conveyor.
  • the blades being designed in the manner described above, they will thus have a lower portion 17 striving to carry the material upwardly and inwardly, and an upper portion 18 striving to move the material downwardly and inwardly towards the conveyor screw.
  • the "sphere-shaped" feeder device will thus function in the manner of a milling cutter and effectively dig loose also densely packed material.
  • FIGS. 1-7 illustrate an embodiment in which the blades 14, 15 proper are formed of two bent sheet metal pieces. Each piece is bent several times in an edge press, i.e. each bending has been carried out about a straight line, even though the orientation thereof is changed along the sheet metal piece.
  • FIG. 8 shows, in planar configuration, a metal plate 19 that may replace the two plates 14, 15 if this plate is bent along the lines shown thereon. The plate 19 may be fitted such that one spoke 12 is accommodated by the space 20 and such that the edge 21 can be welded along the inclined plate 13, the edge portion 22 being welded to the outer side of the cylindrical portion 10.
  • the digging edge 16 of the wing is, in this instance, designed in the same manner as the digging edge 16 in the embodiment according to FIGS. 1-7.
  • the cylindrical portion 10 has three openings 23 with an inwardly bent sheet metal flange 24 which skirts along the outer side of the screw conveyor housing 4 and serves to remove any material that may have penetrated into the gap between the cylindrical portion 10 and the screw conveyor housing 4.
  • the spokes 12 may be extended by a sheet metal piece 25 which is provided on the lee side of the blade 14, 15 and which is especially advantageous for conveying material tending to become fluidised.
  • the sheet metal piece 25 here gives a certain throttling effect to prevent overcapacity in the case of fluidizing materials.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Screw Conveyors (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • External Artificial Organs (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Heterocyclic Compounds That Contain Two Or More Ring Oxygen Atoms (AREA)
  • Packages (AREA)
  • Refuse Collection And Transfer (AREA)
  • Lubricants (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Attitude Control For Articles On Conveyors (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Sorting Of Articles (AREA)
US06/931,441 1985-02-07 1986-01-23 Screw conveyor Expired - Fee Related US4717014A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8500570 1985-02-07
SE8500570A SE449343B (sv) 1985-02-07 1985-02-07 Skruvtransportoranordning for upptagning av gods fran i synnerhet fartyg

Publications (1)

Publication Number Publication Date
US4717014A true US4717014A (en) 1988-01-05

Family

ID=20359044

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/931,441 Expired - Fee Related US4717014A (en) 1985-02-07 1986-01-23 Screw conveyor

Country Status (13)

Country Link
US (1) US4717014A (ro)
EP (1) EP0211927B1 (ro)
JP (1) JPS62501767A (ro)
CN (1) CN1004069B (ro)
AT (1) ATE37696T1 (ro)
BR (1) BR8605134A (ro)
DE (1) DE3660861D1 (ro)
DK (1) DK155655C (ro)
FI (1) FI80657C (ro)
IN (1) IN163476B (ro)
NO (1) NO159919C (ro)
SE (1) SE449343B (ro)
WO (1) WO1986004566A1 (ro)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5089123A (en) * 1989-09-14 1992-02-18 Metanetix, Inc. Apparatus for continuous removal of materials from a liquid
CN105197514A (zh) * 2015-09-23 2015-12-30 中山市乾润精密钢球制造有限公司 一种钢球螺旋供料装置
KR102163098B1 (ko) * 2020-05-22 2020-10-08 주식회사 신흥기공 스크류 방식 석탄하역기의 입구디바이스

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2185957B (en) * 1986-02-05 1989-05-04 Babcock Moxey Ltd Improvements in or relating to screw feeders
SE454586B (sv) * 1986-02-21 1988-05-16 Consilium Marine Ab Anordning for upptagning av loshanteringsgods fran i synnerhet fartyg
DE4116467C2 (de) * 1991-05-21 1995-07-27 Man Takraf Foerdertechnik Gmbh Stetigförderndes Ladegerät für Schüttgüter
CN103964225A (zh) * 2014-04-25 2014-08-06 南通澳润建材科技有限公司 带有取料器的码头螺旋卸船装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467682A (en) * 1944-12-13 1949-04-19 Megargee Joseph Wilfrid Conveyer
US2709075A (en) * 1952-02-28 1955-05-24 August Paul Mixing machines, in particular concrete mixers
US3019895A (en) * 1956-09-11 1962-02-06 Harvey Aluminum Inc Apparatus for separating, washing and classifying solids
US3596751A (en) * 1968-01-17 1971-08-03 Olle Lennart Siwersson Device for supplying material to the entrance end of a conveyor comprising a screw and a conduit therefor
US3685638A (en) * 1970-01-29 1972-08-22 Olle Lennart Siwersson Devices for guiding material to the entrance end of a screw conveyor having a rotatable screw and a conduit therefor
US4467910A (en) * 1980-11-28 1984-08-28 Ab Scaniainventor Vertical conveyor for bulk goods
US4492302A (en) * 1981-01-26 1985-01-08 Ab Nordstroms Linbanor Feeding device for a vertical tube conveyor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE722760C (de) * 1940-07-24 1942-07-20 Carl Schenck Maschinenfabrik D Auflader mit einem mit mehreren Schoepfstellen versehenen Aufnahmekopf und einem anschliessenden Foerderrohr

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467682A (en) * 1944-12-13 1949-04-19 Megargee Joseph Wilfrid Conveyer
US2709075A (en) * 1952-02-28 1955-05-24 August Paul Mixing machines, in particular concrete mixers
US3019895A (en) * 1956-09-11 1962-02-06 Harvey Aluminum Inc Apparatus for separating, washing and classifying solids
US3596751A (en) * 1968-01-17 1971-08-03 Olle Lennart Siwersson Device for supplying material to the entrance end of a conveyor comprising a screw and a conduit therefor
US3685638A (en) * 1970-01-29 1972-08-22 Olle Lennart Siwersson Devices for guiding material to the entrance end of a screw conveyor having a rotatable screw and a conduit therefor
US4467910A (en) * 1980-11-28 1984-08-28 Ab Scaniainventor Vertical conveyor for bulk goods
US4492302A (en) * 1981-01-26 1985-01-08 Ab Nordstroms Linbanor Feeding device for a vertical tube conveyor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5089123A (en) * 1989-09-14 1992-02-18 Metanetix, Inc. Apparatus for continuous removal of materials from a liquid
CN105197514A (zh) * 2015-09-23 2015-12-30 中山市乾润精密钢球制造有限公司 一种钢球螺旋供料装置
CN105197514B (zh) * 2015-09-23 2017-09-29 中山市乾润精密钢球制造有限公司 一种钢球螺旋供料装置
KR102163098B1 (ko) * 2020-05-22 2020-10-08 주식회사 신흥기공 스크류 방식 석탄하역기의 입구디바이스

Also Published As

Publication number Publication date
NO863973L (no) 1986-10-06
BR8605134A (pt) 1987-05-05
JPH0364408B2 (ro) 1991-10-07
DK155655C (da) 1989-09-25
CN86101270A (zh) 1987-02-18
DK474086D0 (da) 1986-10-03
FI864010A0 (fi) 1986-10-03
FI864010A (fi) 1986-10-03
NO863973D0 (no) 1986-10-06
WO1986004566A1 (en) 1986-08-14
NO159919B (no) 1988-11-14
FI80657C (fi) 1990-07-10
EP0211927B1 (en) 1988-10-05
DK474086A (da) 1986-10-03
JPS62501767A (ja) 1987-07-16
NO159919C (no) 1989-02-22
IN163476B (ro) 1988-10-01
SE8500570D0 (sv) 1985-02-07
DK155655B (da) 1989-05-01
ATE37696T1 (de) 1988-10-15
SE449343B (sv) 1987-04-27
SE8500570L (sv) 1986-08-08
DE3660861D1 (en) 1988-11-10
CN1004069B (zh) 1989-05-03
FI80657B (fi) 1990-03-30
EP0211927A1 (en) 1987-03-04

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Legal Events

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AS Assignment

Owner name: AB SIWERTEEL, BOX 66, S-267 00 BJUV, SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:EKELUND, AKE;REEL/FRAME:004629/0847

Effective date: 19860911

Owner name: AB SIWERTEEL,SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:EKELUND, AKE;REEL/FRAME:004629/0847

Effective date: 19860911

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FP Lapsed due to failure to pay maintenance fee

Effective date: 19960110

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362